return {
    type = BT.NodeType.FALLBACK,
    name = "选择节点",
    children = {
        {
            type = BT.NodeType.SEQUENCE,
            name = "顺序节点",
            children = {
                {
                    type = BT.NodeType.CONDITION,
                    name = "条件节点",
                    func = "checkDistance"
                },
                {
                    type = BT.NodeType.ACTION,
                    name = "行为节点_副本",
                    func = "doAttack"
                }
            }
        }
    }
}